It may happen that one or more SSH keys you used to authenticate Bamboo with Bitbucket Data Center source code repositories are missing (for example, when an SSH key expires due to the global expiry policy configured by an admin). In such a case, it's possible to manually regenerate them directly in the Bamboo user interface or by using dedicated REST API endpoints.

Suggestion

Notify the Bamboo admin in advance, for example, 1 week or 1 month before the SSH keys expires.